Biomechanics Tools
Browse all available biomechanics tools.
Available tools
- Biomechanics: Force Plate Cop Coordinate Tool Compute center of pressure in the force-plate origin plane under an explicitly z-up right-handed convention, ignoring horizontal-force height corrections; not clinical analysis.
- Dynamometer Gravity Correction Input Subtract a supplied signed gravity-torque contribution from a measured dynamometer torque without estimating body-segment properties.
- Force Plate Cross Axis Reference Sign Tool Calculate force plate cross axis reference sign from explicit caller-supplied inputs.
- Force Plate Free Moment Normal Component Tool Right-handed contact-plane wrench decomposition Tz=Mz-(x*Fy-y*Fx), using COP coordinates in the same frame as moments.
- Force Plate Shear Resultant Angle Report nonzero supplied forceplate shear magnitude and atan2 direction in radians from the positive x axis.
- Force Platform Cop Reference Gap Tool Compare supplied center-of-pressure coordinates in one frame without deriving COP from wrench data.
- Gait Phase Event Percentage Offset Tool Event position in one supplied gait cycle; no gait-phase norm or diagnosis is selected.
- Gait Step Width From Foot Points Measure a recorded foot-point lateral separation along an explicitly chosen common lateral axis.
- Gait Symmetry Ratio Index Crosswalk Tool Signed 200*(first-second)/(first+second) index, with no absolute value or clinical threshold.
- Gait Toe Heel Distance Projection Project the supplied heel-to-toe vector onto an explicitly supplied unit forward axis without inferring gait direction.
- Ground Reaction Impulse One Panel Tool Trapezoidal vertical force impulse, subtracting body weight once for net impulse; forces are signed on an upward-positive axis.
- Joint Angle Unwrapping Increment Calculate the shortest signed wrapped angle increment in degrees with the exact half-turn tie assigned to -180.
- Joint Angle Wrapping One Cycle Tool Wrap into [lower,lower+period) using a caller-selected angular unit and period.
- Joint Axis Angle Wrapping Gap Tool Wrap an explicit research-axis difference with positive antipodal tie convention, not a clinical range of motion.
- Joint Moment Anatomical Axis Token Tool Retain an explicitly supplied anatomical-axis mapping rather than infer a joint sign convention.
- Joint Power Moment Angular Speed Term Tool Signed rotational mechanical power; SI moment in N*m gives watts.
- Joint Power Normalization Mass Factor Normalize supplied signed joint power by positive body mass without assessing movement quality.
- Joint Work Power Time Factor Tool Integrate supplied mean mechanical joint power over elapsed time, retaining negative work.
- Jump Apex Flight Asymmetry Time Gap Tool Ballistic point-mass flight without air drag; landingBelowTakeoff is a signed vertical drop, and the descending intersection is selected.
- Landing Energy Center Mass Drop Tool Point-mass mechanical energy budget without a landing-force, tissue-load or injury prediction.
- Lever Arm Moment Signed Product Compute a signed planar moment from an explicitly signed perpendicular lever arm and compatible force.
- Marker Frame Condition Ratio Tool Inspect a supplied 3D frame singular-value condition ratio; no matrix factorization or biomechanical validity judgment.
- Marker Segment Relative Coordinate Translate one 3D marker into coordinates relative to a supplied segment origin; no segment rotation is inferred.
- Marker Triangle Area Residual Tool Compare a planar research-marker triangle area with an explicit reference.
- Marker Velocity Central Difference Term Tool Symmetric samples equally spaced on either side of the evaluation instant; sample gap is twice stepSeconds.
- Mechanical Work Positive Negative Split Tool Split already integrated signed work increments; negativeWork retains its sign.
- Moment Arm Sign From Axis Tool Resolve the supplied planar force moment under an explicit normal-axis sign.
- Motion Marker Rigid Segment Length Residual Compare Euclidean distance between supplied aligned marker coordinates with an explicit rigid-segment reference length.
- Muscle Moment Arm Torque Factor Tool Single force projected along the tendon with a signed supplied moment arm; no muscle-recruitment or clinical inference.
- Muscle Physiological Cross Section Force Term Tool PCSA=volume/fiber length; apply pennation only once when projecting fiber force along the tendon.
- Musculotendon Length Reference Ratio Divide supplied musculotendon length by an explicit positive reference length without deriving force.
- Normalized Force Body Weight Reference Tool Calculate normalized force body weight reference from explicit caller-supplied inputs.
- Running Contact Flight Duty Factor Describe one explicitly paired running contact/flight cycle under a stated two-phase segmentation.
- Segment Angular Momentum Inertia Term Tool Planar angular momentum with centerVelocity interpreted as the signed tangential component perpendicular to the radial centerPosition.
- Segment Inertia Parallelaxis Reference Offset Tool Calculate segment inertia parallelaxis reference offset from explicit caller-supplied inputs.
- Segment Inertia Unit Factor Tool Calculate segment inertia unit factor from explicit caller-supplied inputs.
- Segment Inertial Unit Orientation Tag Record explicit segment inertial-sensor frame metadata without rotating measurements.
- Segment Mass Fraction Budget Tool Supplied segment-fraction allocation, preserving signed over-allocation rather than selecting anatomical tables.
- Segment Mass Moment Contribution Tool Apply the parallel-axis contribution to explicitly supplied segment mass and centroidal inertia.
- Stride Contact Double Count Term Tool Calculate stride contact double count term from explicit caller-supplied inputs.
- Stride Normalized Time Percent Normalize one sample time to an explicitly bounded stride interval, including both 0% and 100% endpoints.
- Tendon Strain Slack Length Reference Tool Engineering strain relative to a caller-supplied slack length; negative values remain visible without implying tendon compression mechanics.
- Walking Froude Speed Leg Length Factor Tool Calculate walking froude speed leg length factor from explicit caller-supplied inputs.